1)10x²+5x=0 2)-7x²+343=0 3)9x²-6x+1=0 4)7x²+9x+2=0. Created by Nemec61. algebra-ru

1)10x²+5x=0 2)-7x²+343=0 3)9x²-6x+1=0 4)7x²+9x+2=0...

July 2022 1 2 Report

1)10x²+5x=0
2)-7x²+343=0
3)9x²-6x+1=0
4)7x²+9x+2=0

Answers & Comments

aleks23888 1) 10x^2+5x=0
5x(x+5)=0
x=0;x=-5

2)-7x^2+343=0
7x^2=343
x^2=49
x=7;x=-7

3)9x^2-6x+1=0
D=36-36=0
x=6/18=1/3

4)7x^2+9x+2=0
D=81-56=25
x1=-7;x2=-2

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Answers & Comments

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